1: With sodium hypochlorite; sodium chlorite; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical in water; acetonitrile T=20°C; 16 h; 2: With sodium hydroxide in water; acetonitrile pH=10;

1.1: sodium ethanolate / N,N-dimethyl-formamide / 20 °C 2.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.33 h / 20 - 60 °C 2.2: |Cooling with ice 3.1: carbonic acid diethyl ester; potassium hydroxide / ethanol / 4 h / 110 - 200 °C 4.1: Jones reagent / acetone / 5 h / 20 °C View Scheme

1.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.33 h / 20 - 60 °C 1.2: |Cooling with ice 2.1: carbonic acid diethyl ester; potassium hydroxide / ethanol / 4 h / 110 - 200 °C 3.1: Jones reagent / acetone / 5 h / 20 °C View Scheme

1: carbonic acid diethyl ester; potassium hydroxide / ethanol / 4 h / 110 - 200 °C 2: Jones reagent / acetone / 5 h / 20 °C View Scheme